Shuttle box motion for looms



Oct. 13, 1931. H. w. THATCHER SHUTTLE BOX MOTION FOR LOOMS Filed Feb. 8, 1930 2 Sheets-Sheet 1 lnvenTbr.

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Cd. 13, 1931. w, THATCHER 1,827,272

- SHUTTLE BOX MOTION FOR LOOMS Filed Feb. 8, 1930 2 Sheets-Sheet 2 \n'venTor Hurry VV ThOTC I er WWWAPW ATTys.

' Patented o't. 3, "19s1 nit-nit? Tiniicmin on Emm t .nAssAoniisnrhvsiinssienon J'Tol .DBAPEBFJ J rozmmiomor nor nALn,messeenosnmszn'oonronemon'ors'MAiNE nviuniwgivmmoa3;

' object is'toprovide a'siinple'andefiioient forrn of meohanismlfor'shifting the boxes at, r'eg'u 1;; 1d intervals or atisuch predetermined times asmay-be required: under the" clontrolfjofia "dobby' or'other pattern-mechanism;

1 Theobjectof theinvention is further to provide such a mechanism whichfsh'allbe ie readily adjustable to assen1ble theparts in proper position; or whenever required, to

time themovementof the boxes in'proper re-,

,lation with the other'meohanisms' 'ofthe 100m;

, The object of theinvention 'isjfurthe'rto providemeansfor; giVing.a ,Var-iab le speedto j the shifting lnoyementofthe boxesas may be I required. f 5 l The object of the inyention is further to provide means for giving "such a variable speed. to enable "thebox shifting f motion 'fto have a'slow movementlboth when the gears: .Whieh determine the shifting movement en-7 l 7 p I 1 up I the means for-adjusting theefiective t I'The object of he "invention is further-t0 providefm'eansfor adjusting the connections finiparting shifting mOYmQnt to'the boxes'so' asto vary the efieet' thereof gage and dlsengage lyalt'ering theirpo'sition. .7 These andother' objects and-'features ofthe accompanying description andi drawings and fortlre'me'ohanism" is obtainedctroin one of a the regularjshaftsfof the loomsueh ,-for eX-j ample, as the shaftffrom whi c'htheshuttlef :40.

'pickingmotion is operatedlf. Consequentlyfit is only-necessary hereto-illustrate and'f-describe those parts of 1a loom with? which the invention is particularly concerned;

The drawings disclose a portion fofga side i5 frame of a loom, the-pick motionshafuand' a 'f portionof anfordinary forin of ishifting 'shuts ""tle box struct re, together ithfa preferred l I form of: the" invention embodied'f-thereinl 4 Fig: 1- is sid-eelevation-0ft I.n ipii efio 'nl irFebr ar .s, 19301i isriariwoQiaesoa "thout ni'ateri al- I invention Will" appear moreflfully from the Fig-521a de ete; dew pa tial-lye ghorif zontal-cross section. i t

Fig. 3 is a left-handend elevationaof aportion of the-mechanism. n v

theisidefraniesl of a 55 I loom i-s' 'shown Withltheend of the shaftLQff o A portion of one of employed to operate the'piekin'g motion journalledinthis side frarne; The shifting shut- 1 tle box structure is shown as com'prising the shuttle boxes 3 suppo ted-on the end of age lifter rod 4 mountedto 'slidei longitudinally in thelay, not shown yand having a stud'5 enf o 3 v gaging the giveway'linki'oonnection 6 of a .familia'r type adjustablypivoted at :7 tea. horizontally disposedlever l'8 Thus, inv afiis manner generally Well knoWn-andiamiliar in theart, the shuttle box: stnucture is raised and lowered to-bring one or the other of the 1 "boxes nto Working position, asrequi'i-ecl; by themovementof the le'VIe'r SJ The invention, 3

inflit's preferred form; has to do" with :the

njeansfor operating this lever and' also'with l ii-row of I this" lever;

j In th'e -preferred "constr'uotion illustratedyw Ta.braoket 9'coinprising a generallyflat plate y is rigidlyjsecured tothe sidefraine lj of the lojomfon the outside thereof and in "parallelism therewith, Forlthis purpose thebracket .9i 'sprovided with separatingsleeyes IOZeX -SO tending between it jand' the side"frame. 1

through Whiel'i-bolt-s 11:11am: passed and which rigidly securethebraoket totheiside framep' The bracket 9" is provided with abearing diameter vbeing journalle'din theliu'b 12, the

j sectionili -of smallest diameterrextend ing to: =90 wardthe frame, and the'fs'eotion I5foflargest j hilb 'lZ in'which is journalled; parallelto the i 85 driving shaft 2, anfauxiliary 'shaft?- This a'uxiliary-shaft is shown as'haying three ina 'te'gralsections;the.sectionlg ofinte'rrnediate T enable the speed of the auxiliary shaft to vary with respect to the constant speed of the driving shaft and thus enable, for example, the shifting mechanism to ope-rate at a slow speed when the shifting gears are engaging and disengaging or which enablethe speed to be'changed for any other reason desired.

Any suitable means for carrying out these purposes may beprovide-d for thus transmitting themotion from the shaft 2 to the auxiliary shaft, preferably, however, a train or system of gears, and for that purpose a pair of meshing eccentric gears is illustrated.

one on each shaft, and one of which is rotarily adjustable with respect to the shaft upon which it is mounted. For that purpose there is shown an eccentric gear 16 secured to and rotatably adjustable on the shaft 2 by means of the set screws 17 and a cooperating eccentric gear 18 keyed at 19 to the section 14 of the auxiliary shaft.

' The mechanism for transmitting motion from the auxiliary shaft to the lever 8 by which the boxes are shifted as required is of a generally old type of construction. A mutilated gear 20 is journalled on a shaft 21 mounted in thebracket 9 and extending out wardly therefrom in parallelism with the auxiliary shaft. This mutilated gear has a hub 22 provided with positioning recesses into which a roller 23 carried by a detent arm 24 is pressed each time a shifting movement is completed. This detent arm is shown as having a hub 25 journalled on astud 96 projecting outwardly from the bracket and is controlled by a spring 27 on the hub.

A longitudinallyadjustable link 2811s journalled at its upper end on the stud 29 secured in a crank arm 30 rotating with the gear 20 and at'its lowerend is pivoted at 31 to the lever 8.

It willthus be 'seenthat with each half rotationof the gear 20 the lever 8 is rocked and the boxes shifted up or down. Various adjustments are providedfor controlling; the

position and the extent of movement of the boxes. The link 28 is itself adjustable lengthwise by means of a turnbuckle construction 32, the lifter rod 4 is adjustable in the box structure at 33, the" lower end of the give-way link 6 has its pin 7 longitudinally adjustable in the slide 34 ofthe lever 8. But a novel adjustment is here provided for the fulcrum of thexlever 8 which enables this fulcrum to be adjusted so as to vary the leverage ratio without changing the position of the lever.

In the constructionillustrated, a bracket 35'is secured to the loom side 1 by bolts 36 and'projects outwardly therefrom. A. bearing stud is adjustably mounted inthis bracket. This bearing stud comprises a shouldered sleeve 37 having its larger end abutting the outer face of the bracket 35 which is slotted horizontally at'88 and further comprises a bolt 89 passing through the sleeve with its head 40 on theinside of the bracket and with the nut 41 abutting a washer 42 resting against the outer end of the sleeve 87. Thus it will be seen that the bearing stud may be adjusted by means of the bolt 39 in a general horizontal direction and longitudinally of the lever in the bracket 35. The lever 8 is provided with a fulcrum hub 43. This hub isjournalled on the smaller section of the sleeve 37 of the bearing stud and is adjustable longitudinally of the lever by means'of the bolts 44 passing through slots both in the fulcrum hub and in the lever while a slot 45 in the lever enables the bearing stud to move with the hub without moving the lever. Thus it will be seen that the fulcrum with, the gear 20, as required, by any usual suitable mechanism. In the form illustrated, the gear 46 is provided with a grooved hub 48, the groove of which is engaged by a forked arm 49 secured by the set screws 50 to a shaft 51 journalled in lugs 52 projecting outward from the bracket 9. An arm 53 is secured by set screws 54 to the shaft 51 and projects inwardly therefrom. This arm 53 is shown as operated by a rod 55 extending upwardly therefrom to a dobby or other suitable pattern mechanism. A set screw 56 adj ustably mounted inthe arm 53 abuts against the bracket 9 to limit the outward throw of the sector gear 46 and a spring 57 coiled on the shaftv 51 and engaging at one end the lug '52 and at the other end a collar 58 on the shaft acts normally to move the sector gear 46 inward or to meshing position.

If the gears 46 and 20 are left in mesh, as shown, the shift of the shuttle box structure will take place regularly at each rotation of the auxiliary shaft. The sector gear 46 is also shifted under the control of a dobby or other mechanism through the rod 55 and this shift will take place as determined thereby, all in the well-known and familiar manner.

ltwill thus be seen that there is provided a simple and elfective mechanism for securing the shift of the shuttle boxes which can be readily assembled or readily adjusted at any time so as to provide a proper relation between the movement of the shuttle boxes and the pick motion or other mechanism of the loom, that the speed of the shifting movement may be varied as desired, and that the lever throughwhiclrthe shifting movement is transmitted may be adjusted so as to ad;

f just the shifting movement without altering the position'of the lever, i

-Iaving thus described the invention, what is'claimed as new,and desired to be secured by Letters Patent, is: '7

1. In a loom, a shiftable shuttle box structure, a pair of gears having parallel axes and one ofwhich is shiftableon its axis into I and out of mesh'with the other, means ineluding a lever connecting one of said gears to the shuttlebox' structure to'impart shiftin motion thereto, means for rotating the 2.. In a 'l oom, a shiftable shuttle boxstruc- V ture, a'pair of gears having parallel. axes I ,lever in transmitting the shifting'movement and one of which is shiftable on its axis into and outof mesh with the other, means including a lever connecting'one of said gears to the shuttle box stru'cture to impart shifting motion thereto, means for rotating the othcrgear, a fulcrum 'hubfsecured' to and.

adjustable longitudinally of said lever and a bearing stud for the hub'securedv to the loom and adjustable thereon longitudinally of the lever thus to'permit the effect of the [to be variedwithoutaltering the position of the lever. 1 a a 3. Ina loom, a shiftable shuttle box struc ture, a bracket rigidly secured to the loom side in parallelism therewith, a driving shaft having a bearing in the loom side and proj ecting therethrough, anfauxiliary shaft having a. bearing in the bracket and projecting at both sides thereof, a pairof intermeshing ing a bearing in the bracket and projecting at both sides thereof, a pair of variable speed intermeshing gears between the side frame and the bracket mounted respectively on'the said shafts,me'ans for adjusting one of the said gears rotarily withrespect to the shaft on which it is mounted, a gear non-'rotatably mounted on the auxiliary shaft outside the bracket, a gear journalledo-n the outside of the bracket and adapted to meshwith the preceding gear, means for shifting one of said latter two gears on its axis into and out of mesh with theother, and means connecting the gear journalledonthe outside of said bracket to the" shuttle box structure to im-- part shifting motion thereto.

a 5. Ina loom, a shiftable shuttle assent, I

ture, a bracket rigidly secured to the loom side in parallelism therewith, a drivings'haft having a bearing in the loom side and pro-- jecting therethrough, an auxiliary shaft hav- 1 mg, a bearing in the bracket and projecting at both sides thereof, a pair-of intermeshing t gears between the side frame and the bracket mounted respectively on the said shafts, means for adjusting'one'of' the said gears ro-. tarily with respect to'the shaft on which I it is mounted, a sector gear keyed tothe-auxiliary shaft on the outside of the bracket, a

mutilated gear journalled on the bracket and adapted to mesh with the sector gear, means t connecting the mutilated .gear to the shuttle Y I box structure to impart shifting motion thereto, and means: for shifting the sector.

gear on the auxiliary shaft into and out Of mesh with the mutilated gear.

HARRY w. THATCHER. 1

gears between the side frame and the bracket mounted respectively on the said shafts,"

means'for adjusting one of the said gears it is mounted, a gear non-rotatably mounted on the auxiliary shaft outside thebracket,

a gear j ournalled on the outside of the brack rotarily with respect to the shaft on which,

etand adapted to mesh with the preceding I gear, m'eansfor shifting one of said latter. two gears on 1ts axls nto andout of mesh TVlth the other, and means connecting the;

gear journalled on the outside of said bracket to the shuttle box structure to impart shifting motion thereto. 1 i

- 4. In a loom, a shiftable shuttle box structure, a bracket rigidly secured to'the loom side in parallelism therewith, a driving shaft having a bearing in theloom sideland prov jecting therethrough, an auxiliary shaft hav- In testimony whereof, I have signed my name to this specification. 

